Results 41 to 50 of about 3,074 (215)

Solid Inclusions in Au-nuggets, genesis and derivation from alkaline rocks of the Guli Massif, Northern Siberia

Open Geosciences, 2016
A total of 112 Au-nuggets, collected from alluvial placer deposits of the Ingarinda River from the Guli massif, located in northem Siberia, Russia, were investigated.
Dvorani Sami N.
doaj   +1 more source

Petrology, Geochemical Characteristics, Tectonic Setting, and Implications for Chromite and PGE Mineralization of the Hongshishan Alaskan-Type Complex in the Beishan Orogenic Collage, North West China

Frontiers in Earth Science, 2021
The Hongshishan mafic-ultramafic complex is situated in the north of the Beishan orogenic collage and the southern part of the Central Asian Orogenic Belt.
Zhaolin Wang, Zhaolin Wang, Xiaoming Zheng, Guixiang Meng, Guixiang Meng, Hejun Tang, Hejun Tang, Tonghui Fang   +7 more
doaj   +1 more source

Mantle Wedge Metasomatism During Subduction Initiation: Mineral Transformations and Fluid Fluxes (BOIC Ophiolite, Newfoundland)

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The soles of ophiolites preserve slices of oceanic crust metamorphosed to amphibolite‐ to granulite‐facies conditions beneath heavily deformed mantle peridotites, providing key records of fluid and mass transfer across nascent subduction interfaces.
Louise Mérit, Philippe Agard, Loïc Labrousse, Benoît Dubacq, Cécile Prigent, Carl Guilmette, Jean H. Bédard, François Fournier‐Roy, Horst R. Marschall, Axel Gerdes, Benjamin Lefeuvre, Alana Hinchey   +11 more
wiley   +1 more source

Petrocrafical and mineralogical features of ultramafits from Kirelsk fragment of Kansk greenstone belt (NW of the East Sayan)

Известия Томского политехнического университета: Инжиниринг георесурсов, 2017
Ultramfits of the studied territory are perspective on detection of Cu-Ni with platinum-group elements deposits that causes the relevance of their research. The main aim of the study.
Aleksey Ivanovich Chernyshov, Nikita Anatolievich Babintsev, Valery Gavrilovich Voroshilov   +2 more
doaj   +2 more sources

Earthquakes and the Metamorphic Sole of the Tinos Ophiolite, Cyclades, Greece

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract We analyze deformation fabrics, compositions of melts, metamorphic temperatures, and paleopiezometric data beneath the Tsiknias Thrust, Tinos, Greece, which formed part of the plate boundary that, in Late‐Cretaceous time, absorbed convergence between Africa and Europe associated with final closure of the Vardar Ocean.
Thomas Lamont, Philip England, Lars Hansen, Andrew Smye   +3 more
wiley   +1 more source

Deep Crustal Magma‐Water Interaction During Oceanic Core Complex Termination of the Godzilla Megamullion in the Parece Vela Basin

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Oceanic Core Complexes (OCCs) in back‐arc basins are not as thoroughly investigated, and their termination processes remain poorly understood. The Godzilla Megamullion is the largest known ceased OCC on Earth, yet magmatic and hydrothermal records from its termination are lacking.
Han‐Tao Chi, Guo‐Liang Zhang, Ji Zhang, Chang‐Ming Lu   +3 more
wiley   +1 more source

Microscale Hyperspectral Mapping of a Kilometer of Mantle Rocks: Insights Into Low‐Temperature Serpentinization Systems From the Oman Drilling Program Cores

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Characterizing products of water‐rock interactions in low‐temperature serpentinization of ultramafic rock is key to reconstructing fluid alteration histories of the crust and identifying subsurface habitable environments. We analyzed terrestrial peridotites from the Samail ophiolite using visible to near‐infrared (VNIR‐SWIR) microimaging ...
Lucia Mandon, Bethany L. Ehlmann, Rebecca N. Greenberger, Eric T. Ellison, Lisa E. Mayhew, Alexis S. Templeton   +5 more
wiley   +1 more source

Petrogenesis of heterogeneous mantle peridotites with Ni-rich olivine from the Pujada Ophiolite, Philippines

Journal of Asian Earth Sciences: X, 2020
Nickel (Ni) enrichment (>0.40 wt%) in olivine was previously recognized in mantle xenoliths and volcanic rocks. Though this enrichment is often attributed to subarc metasomatic processes, the occurrence of Ni rich olivines in mantle peridotites remains ...
Valerie Shayne V. Olfindo, Betchaida D. Payot, Gabriel Theophilus V. Valera, Shoji Arai   +3 more
doaj   +1 more source

Mechanical Modification of Chondrule Fine-grained Rims by Dusty Nebular Shocks

The Planetary Science Journal, 2023
The mechanical processes that convert an initially fluffy chondrule fine-grained rim (FGR) into a more compact structure remain poorly characterized.
Augusto Carballido, Lorin S. Matthews, Romy D. Hanna, Truell W. Hyde   +3 more
doaj   +1 more source

Vanadium Isotopic Compositions of the High‐3He/4He Baffin Island Lavas

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The isotopic composition of vanadium (V) in hotspot lavas provides new insight into the source of deep mantle heterogeneities. We measured V isotopic compositions in Paleogene Baffin Island lavas, which erupted above the Iceland plume head, to constrain the mantle plume source. These lavas have V isotopic compositions that are lighter (−0.96 ± 
Jonas Kaare‐Rasmussen, Forrest Horton, Maureen Auro, Andy W. Heard, Sune G. Nielsen   +4 more
wiley   +1 more source